U3685 Alvis Tc21 OBD Code

OBD/2 U3685 error code description and symptoms.

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

U3685 Alvis Tc21 Error Code Repair Process :

For electronic throttle monitor data available check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. U3685 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks electronic throttle monitor data available with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Alvis Tc21 U3685 OBD2 Code

A common cause of code U3685 is the failure of Electronic Throttle Monitor Data Available, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Faulty spark plug (s)
Ignition coils circuit poor electrical connection
EVAP system hose leaking

U3685 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U3685 Alvis Tc21 OBD Code

U3685 Alvis Tc21 Error Code Repair Process :

Common Causes of Alvis Tc21 U3685 OBD2 Code

U3685 code for other Alvis cars